Distilling oven



April Z7 1926. l '1,582,650

O. LASCHE ET A1.

DISTILLING vEN Filed Nov. l5. 1923 Patented Apr. 27, 192e.

UNiTEDsTATEs PATENTA oFFicE,

. OSKAR LASCHE, DECESED, LATE 0F BERLIN-CHARLOTTENBURG, `G'ERllIAlILY'; BY I -FRITZ LASCHE, EXECUTOR, F BERLIN-CHARLOTTENBURG, GERMANY, AND CARL GEISSEN, OF BERLIN-SCHONEBERG, GERMANY, ASSIGN'RS TO KOHLENVEREDLUNG G. M. B. H., or BERLIN, GERMANY, A FIRM.

` DISTILLING OVEN.

Application niet November 15, 1923. serial No. 675,021.

To all lLai/wm it may concern.'

Be it known that OSKAR. LAscHi-i, 'deceased, formerly residing at Berlin-Charlottenburg, Germany,and GARLGEISSEN, a resident of Berlin-Schoneberg, Germany, both of them citizens of the German Empire, have made an invention relating to an Improvement in Distilling Ovens (for which they have. filed application in Germany, October 5, 1922),v of which the following is a specification. v

This invention relates to the distillation of solid fuel and similar material and more Vespecially to a distillation oven for bituminous fuel, its particular object being to improve the worlringgconditions of such ovens and to increasetheir output. v

In certain distillationovens hitherto in use the material to be subjected to distillation in order to recoverfthe volatile constituents travels down a plurality of superposed in clined surfaces formed by truncated cones or bells, heat being applied from outside or both from the outsidev and the inside Vand the volatile products escaping either through gaps between the cones or bells into the central part of t-he oven or together with the heating gases into an outer zone surounding the cones or bells and heated from without. Obviously, in 'this class of ovens the volatile products expelled from the solid material, while traveling through the oven are subjected tothe action of the high temperature prevailing therein andare therefore liable tov suffer decomposition, apart from the danger of bein 4diluted by the products of coinbustion of t e heating gases.

In` the oven according to the present in vention .the material to be subjected 4to dis.- tillation is evenly distributed on the louter ksurface of 'a preferably cylindrical shell closed all around, means being provided for i' keeping and guiding the material in contact vwith the outer shell surface. Thisshell .is heated merely from within, a suitable burner bein forinstanc'e disposed below and axially o the shell, and the gases of combustion vare allowed to escape through a stack on `the up er end of the shell, so that the'material vun er treatment as well as vthe volatile productsexpelled therefrom are protected against anycontactwith the heating gases and their i products of combustion. Oni the other*l hand, l

the volatile roducts, while forming under the laction o the heat acting on the solid material from within, are at once withdrawn from the injurious action ofthe heat and are free to escape in radial direction without coming in contact with any. heated surfaces. These products will thus leave the oven without suffering any decomposition. They are removed from the oven in the shortest time and on the shortest way through openings provided in the system of outer guide,

surfaces as soon as they are formed and are caused to pass into a chamber surrounding the oven. Means can be provided for cooling this chamber, which may further serve for vseparating out the dust and for eecting a be treated and is subdivided in a plurality of superposed annular zones. These zonesare formed by superposed annular guide funnels c which cause vthe, material to be treated to slide down in the annular space between the cylinder and-the funnels according to its angle 0f slope. The heating cylinder b is arranged to revolve or to execute a rotary` pendulumniotion relatively to the outer guide funnels. y is an outer jacket surrounding the guide funnels o and spaced therefrom.

We may, however, also employ a stationary heating cylinder and movable guide funnels. In order that-the relative motion of the cylinder b and-.guide funnels c be accompanied by a grinding action, we may arrange the axes of rotation of the two systems of conica-l surfaces eccentrically with regard. to each other oi'- wev can make them a justable eccentrically. At the upper` portion of cylinder b vanes d'can' be provided fordistributing the material to be distilled which is supplied,

for expelling the exhausted material through the tube t. Intermediate the guide funnels openings f are provided for the escaping gases of distillation. The cylinder b is made to revolve'inr a well known manner by a worm g acting on a helicall toothed rim r mounted on the top ed e of t e cylinder b. The cylinder b is furt er arran ed to be adjusted axially with re ard t0 t e guide funnels c, the adjustment ingjeifecte by means of a double armed lever o erated by a hand wheel lc and acting from elow on the rim r. A gas supply pipe z' projecting axially into the bottom portion of the cylinder a serves for burning a mixture of gas and air, the narrow flame formed extending into the in-o terior of the cylindrical heat accumulator and equalizer a closed on top by a vertically displaceable cover 'v and`provided with openings w allowing the gases of combustion to escape between the cylinders a and b and 'through the stack u. The sectional area of the passages between the narrow nozzles formed by the partial heating surfaces of cylinder b and the guide funnels surrounding them can be regulated by lifting or lowerin the -cylinder b. We may, however, also li or lower each guide funnel separately, for instance by means such fasl a hand wheel and' spindle lz, actuating a double armed lever :c acting on the guide funnel from below.

We wish to be -understood that we do not desire to be limited to the'exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

We claim 1. oven for the vdistillation gf goud* fuel and similar material comprising a cylindrical transversely corrugated shell arranged with its axis in vertical position, means for heating such shell from within, means for forming on and in contact with the outer surface of said shell a layer of the material to be distilled and a non-heated jacket surrounding said layer forming means and spaced therefrom.

2. Oven for the distillation of solid fuel and similar material comprising a cylindrical shell, means heating such shell from within, circular adjustable guiding means surrounding said shell and spaced therefrom, said guiding means serving to cause the material to be distilled to travel on and in contact with the outer surface of said shell and a non-heated jacket surrounding said guiding means and spaced therefrom.

Oven for the distillation of solid fuel 'and similar material comprising a cylindrical shell, means for heating such shell from within, circular adjustable guiding means surrounding said shell and spaced therefrom, said guiding means serving to cause the material to be distilled to travel on and in "contact with the outer surface of said shell,

means for axially adjusting said guiding- In testimony whereof we ailix our signatures.

FRITZ LASCHE, TwQEecuz/or of the Estate of Oskar Lcke, deceased.

CARL GEISSEN. 

